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Atsukawa N, Nakai G, Omura S, Yamamoto K, Yamada T, Ohmichi M, Osuga K. Imaging features of mucinous carcinoma arising from mature teratoma showing cytokeratin 7+ and cytokeratin 20+ expression profile: A case report. Radiol Case Rep 2024; 19:1288-1293. [PMID: 38292777 PMCID: PMC10825558 DOI: 10.1016/j.radcr.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/01/2024] [Indexed: 02/01/2024] Open
Abstract
Ovarian mature teratomas are benign, but malignant transformation can occur infrequently, especially in women of advanced age. The tissue that undergoes malignant change is mostly squamous cell carcinoma, although adenocarcinoma has been reported in a small number of cases. The immunostaining results of adenocarcinoma usually show a cytokeratin (CK)7-/CK20+ expression profile, corresponding to lower gastrointestinal tract origin. In this report, we describe a case of mucinous carcinoma arising from an ovarian mature teratoma showing a CK7+/CK20+ profile and discuss its imaging features. A 40-year-old woman presented to her primary care physician with abdominal distension and poor oral intake, and she was referred to our hospital. She had been diagnosed with an ovarian mature teratoma at our institution 3 years earlier. At the current presentation, pelvic magnetic resonance imaging showed a large multilocular cystic mass with adipose tissue extending into the upper abdomen. Densely packed cysts were observed inside the mass, which showed weak contrast enhancement on contrast-enhanced imaging and a mildly high signal on diffusion-weighted imaging. A portion of the cysts also showed abnormal 18F-fluorodeoxyglucose uptake (maximum standardized uptake value, 13.2) on positron emission tomography/computed tomography. The patient was subsequently diagnosed with mucinous carcinoma showing a CK7+/CK20+ profile arising from a mature teratoma by pathologic examination. This mucinous carcinoma arising from a mature teratoma showed a CK7+/CK20+ profile and took the form of densely packed multilocular cysts. In this respect, it was similar to primary ovarian epithelial mucinous carcinoma on both magnetic resonance imaging and pathologic examination despite showing a much higher maximum standardized uptake value than that of primary ovarian mucinous carcinoma. When a large ovarian teratoma contains a large multilocular cyst, the presence of densely packed multilocular cysts should not be missed even in a mass without solid components. Clinicians should consider the possibility of mucinous carcinoma showing a CK7+/CK20+ profile arising from a mature teratoma in such cases.
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Affiliation(s)
- Natsuko Atsukawa
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
| | - Go Nakai
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
| | - Shoko Omura
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
| | - Kazuhiro Yamamoto
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
| | - Takashi Yamada
- Department of Pathology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
| | - Masahide Ohmichi
- Department of Obstetrics and Gynaecology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
| | - Keigo Osuga
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Takatsuki City, Osaka, Japan
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Yamamoto K, Yamamoto K, Nakai G, Fujitani T, Omura S, Azuma H, Osuga K. Detection of the Vesical Arteries Using Three-dimensional Digital Subtraction Angiography Relevant to Intra-arterial Infusion Chemotherapy for Bladder Cancer Using Double-balloon Catheters. Interv Radiol (Higashimatsuyama) 2023; 8:64-69. [PMID: 37485483 PMCID: PMC10359176 DOI: 10.22575/interventionalradiology.2022-0030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 10/31/2022] [Indexed: 07/25/2023]
Abstract
Purpose This study aims to assess and measure the origin of the superior vesical artery and its distance from the anterior trunk of the internal iliac artery, to which the anticancer drug is infused via double-balloon-occluded arterial infusion bladder-preserving therapy for locally invasive bladder cancer. Material and Methods The 160 pelvic sides of 80 patients were analyzed. Double-balloon catheters were bilaterally introduced into the contralateral superior gluteal artery via the internal iliac arteries using a bilateral transfemoral approach. The proximal balloon is placed at the internal iliac artery, proximally from superior gluteal artery bifurcation, whereas the distal balloon at the origin of the superior gluteal artery to isolate the anterior trunk of the internal iliac artery discharging to the targeted vesical arteries between the balloons. The side hole between the distal and proximal balloons was adjusted at the origin of the anterior trunk of the internal iliac artery to allow clear visualization of the angiographic flow into the bladder. After the distal and proximal balloons were inflated, three-dimensional rotational digital subtraction angiography was performed by simultaneous contrast injection from one extension tube connected to bilateral catheters. The distance (X) between the origins of anterior trunk of the internal iliac artery and superior vesical artery was measured on three-dimensional digital subtraction angiography images, and the origin of the inferior vesical artery was investigated. Results All superior vesical artery originated from anterior trunk of the internal iliac artery. The mean x was 7.2 mm (range 1.0-22.0 mm). All inferior vesical arterys branched from anterior trunk of the internal iliac artery or its branches. Conclusions Superior vesical artery commonly originates from the proximal portion of anterior trunk of the internal iliac artery close to superior gluteal artery bifurcation.
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Affiliation(s)
- Kiyohito Yamamoto
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Japan
| | - Kazuhiro Yamamoto
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Japan
| | - Go Nakai
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Japan
| | - Tomohiro Fujitani
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Japan
| | - Shoko Omura
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Japan
| | - Haruhito Azuma
- Department of Urology, Osaka Medical and Pharmaceutical University, Japan
| | - Keigo Osuga
- Department of Diagnostic Radiology, Osaka Medical and Pharmaceutical University, Japan
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Shimojima Y, Kishida D, Ichikawa T, Kida T, Yajima N, Omura S, Nakagomi D, Abe Y, Masatoshi K, Takizawa N, Nomura A, Kukida Y, Kondo N, Yasuhiko Y, Yanagida T, Endo K, Hirata S, Kawahata K, Matsui K, Takeuchi T, Ichinose K, Kato M, Yanai R, Matsuo Y, Yamasaki A, Nishioka R, Takata T, Moriyama M, Takatani A, Ito T, Miyawaki Y, Ito-Ihara T, Kawaguchi T, Kawahito Y, Sekijima Y. POS0822 HYPERTROPHIC PACHYMENINGITIS IN ANTINEUTROPHIL CYTOPLASMIC ANTIBODY-ASSOCIATED VASCULITIS: A MULTICENTER SURVEY IN JAPAN. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundHypertrophic pachymeningitis (HP), characterized by an inflammatory disorder indicating intracranial or spinal thickening of dura mater, is found to develop as a neurological involvement in antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). Meanwhile, the previous studies focusing on HP in AAV have been reported as a single-institution study, and the analyses were performed in a small number of patients because HP is a rare neurological disorder. Therefore, neither etiological nor clinical characteristics of HP in AAV have been adequately elucidated.ObjectivesThis study clarified the characteristics of HP in AAV by analyzing the information of multicenter study in Japan (Japan collaborative registry of ANCA-associated vasculitis: J-CANVAS).MethodsWe analyzed the clinical information from 541 Asian patients with AAV enrolled in J-CANVAS. Of them, newly diagnosed and relapsed AAV were included in 448 and 93, respectively. The epidemiological and clinical findings were compared between patients with and without HP. Clinical manifestations related to AAV were evaluated based on the Birmingham Vasculitis Activity Score version 3. To elucidate independent factors in HP development, logistic regression analyses were additionally performed.ResultsOf the total 541 patients (mean age: 71±14 years, M:F = 1:1.2), HP was demonstrated in 28 (5.17%), including 17 (3.79%) in newly diagnosed AAV and 11 (11.8%) in relapsed AAV. The classification of granulomatosis with polyangiitis (GPA) was significantly higher in patients with HP than those without HP (50% vs. 21%, p = 0.0007). In newly diagnosed AAV, patients with HP significantly had higher GPA classification and higher positivity for PR3-ANCA than those without HP (53% vs. 17%, p = 0.001; 29% vs. 9%, p = 0.015, respectively). Conversely, positivity for MPO-ANCA was significantly higher in patients with HP than those without HP in relapsed AAV (91% vs. 55%, p = 0.025), despite not significantly different in the classification of AAV. Headache and cranial neuropathies were significant neurological symptoms in patients with HP compared to those without HP (82% vs. 6.6%, p < 0.0001; 32% vs. 2.9%, p < 0.0001, respectively). Besides, ear, nose and throat (ENT) and mucous membranes/eyes were significantly higher involvements in patients with HP than in those without HP (54% vs. 26%, p = 0.003; 29% vs. 9%, p = 0.003, respectively). Moreover, higher complications of “conjunctive hearing loss” and “sudden visual loss”, which are included in the categories of ENT and mucous membranes/eyes involvement, respectively, were significantly indicated in patients with HP than those without HP (39% vs. 7.2%, p < 0.0001; 21% vs. 1.2%, p < 0.0001, respectively). Multivariable logistic regression analysis identified that ENT (odds ratio [OR] 1.28, 95% confident interval [CI] 1.09 to 1.49, p = 0.002) and mucous membranes/eyes involvement (OR 1.37, CI 1.14 to 1.65, p = 0.0006), as well as conjunctive hearing loss (OR 4.52, CI 1.56 to 13.05, p = 0.005) and sudden visual loss (OR 1.84, CI 1.12 to 3.00, p = 0.015), were independent related factors in patients with HP.ConclusionGPA could be significantly classified in patients with HP. Notably, patients with HP significantly showed higher positivity for PR3-ANCA than those without HP in newly diagnosed AAV. Furthermore, sudden visual loss and conjunctive hearing loss might be implicated in HP development.Disclosure of InterestsNone declared
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Kawamori K, Oguro N, Kida T, Omura S, Nakagomi D, Masatoshi K, Takizawa N, Nomura A, Yuji K, Kondo N, Yasuhiko Y, Yanagida T, Endo K, Hirata S, Kawahata K, Matsui K, Takeuchi T, Ichinose K, Kato M, Yanai R, Matsuo Y, Shimojima Y, Nishioka R, Yamasaki A, Takata T, Ito T, Moriyama M, Takatani A, Miyawaki Y, Kawahito Y, Ito-Ihara T, Kawaguchi T, Yajima N. AB0625 Association between Cytomegalovirus Reactivation and Renal Prognosis during Remission Induction Therapy for ANCA-Associated Vasculitis. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.3011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundCytomegalovirus (CMV) has been associated with atherosclerosis in patients with chronic renal failure, and may cause secondary nephrotic syndrome. Therefore, we hypothesized that the reactivation of CMV by immunosuppressive therapy in patients with vasculitis may affect renal function.ObjectivesThe purpose of this study was to investigate relationships between CMV infection and renal function during ANCA-associated vasculitis remission induction therapy.MethodsThis retrospective cohort study enrolled microscopic polyangiitis (MPA), granulomatosis with polyangiitis (GPA), and eosinophilic granulomatosis with polyangiitis patients at 25 sites in Japan who had a first or severe relapse between January 2017 and June 2020. Of these, patients with MPA or GPA who had a positive renal lesion score on BVAS (version 3) at baseline, or vasculitis findings on renal biopsy, CMV assayed by 48 weeks of treatment, were included. Patients were divided into two groups based on the presence or absence of a positive CMV antigen test during the remission induction phase (0–48 weeks of treatment). Outcomes were the rate of change in estimated glomerular filtration rate (eGFR) at 48 weeks after initiation of treatment in both groups, as determined by (eGFR at 48 weeks - eGFR at the initiation of treatment)/eGFR at the initiation of treatment; where lower values were associated with worse renal function. General linear models adjusted for age, gender, presence of diabetes or chronic kidney disease, and the use of rituximab or cyclophosphamide were generated.ResultsA total of 387 patients had CMV antigen measured during ANCA-associated vasculitis treatment, of which 164 had renal involvement and eGFR measured at 48 weeks. Seventy-seven (47.0%) were male and the median age was 75 years (range 69–80 years). CMV reactivation was observed in 44 patients (26.8%). The beta coefficient of multiple regression analysis with CMV positive as 1 and negative as 0 was 0.08 (95% confidence interval -0.13 to 0.29) (p = 0.47). The rate of change in eGFR was higher in the CMV positive group, but not statistically significantly.ConclusionContrary to our hypothesis, renal prognoses tended to be better when CMV reactivation was observed. The patients in the CMV reactivation group may have been treated more aggressively, and some patients with a poor prognosis who were not followed up for 48 weeks dropped out. Further research investigating the adjustment of treatment methods is required.Disclosure of InterestsNone declared
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Nishioka R, Mizushima I, Kida T, Omura S, Nakagomi D, Masatoshi K, Takizawa N, Nomura A, Yuji K, Kondo N, Yasuhiko Y, Yanagida T, Endo K, Hirata S, Kawahata K, Matsui K, Takeuchi T, Ichinose K, Kato M, Yanai R, Matsuo Y, Shimojima Y, Yamasaki A, Takata T, Ito T, Moriyama M, Takatani A, Miyawaki Y, Ito-Ihara T, Kawaguchi T, Yajima N, Kawahito Y, Kawano M. POS0247 GLUCOCORTICOID TAPERING STRATEGY FOR ANCA-ASSOCIATED VASCULITIS: ADDRESSING THE GAP BETWEEN RECOMMENDATIONS AND REAL-WORLD PRACTICE. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.3039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundAntineutrophil cytoplasmic antibody -associated vasculitis (AAV) is usually treated with combination of high-dose glucocorticoid (GC) and immunosuppressive agents, followed by tapering GC dose. Although the European League Against Rheumatism (EULAR) has specific recommendations for tapering the GC dose, clinicians often taper it slower than recommended due to concerns of potential disease relapse. However, such slower taper may prolong GC exposure for the patients, increasing the risk of adverse events, particularly infection.ObjectivesThe aims of our study were (1) to clarify GC dose tapering in the treatment of AAV in a real-world setting, in contrast to the EULAR recommendation of 2015 and (2) to compare the incidence of AAV relapse and severe infection between patients underdoing EULAR-recommended tapering and those undergoing slower tapering than the recommendation.MethodsIn this multicenter (25 sites in Japan), observational, retrospective study of AAV, 541 patients who had initial or severe relapse were enrolled between January 2017 and June 2020. Of these, 349 patients with microscopic polyangiitis (MPA) or granulomatosis with polyangiitis (GPA) who entered in GC tapering phase after successful induction treatment were included. These patients were then grouped on the pace of GC tapering, defined as the GC dose at 12 weeks after treatment initiation: (1) EULAR group: 7.5-10 mg/day of GC, according to the EULAR recommendation of 2015, and (2) SLOWER group: >10 mg/day of GC. Their baseline characteristics and clinical outcomes were compared. Primary outcome was defined as relapse-free days from treatment initiation, whereas secondary outcome included the incidence of infectious events requiring hospitalization within 48 weeks from treatment initiation. Multivariable analysis was performed to assess the relationship between tapering pace and clinical outcomes.ResultsThere were 44 patients (12.6%) in the EULAR group and 290 (83.2%) in the SLOWER group. Regarding baseline characteristics, compared with the EULAR group, the SLOWER group had significantly higher serum C-reactive protein level (EULAR, 5.89 ± 6.89 mg/dL vs SLOWER, 7.56 ± 6.01 mg/dL; p = 0.03), as well as a trend toward higher Birmingham Vasculitis Activity Score (version 3) (EULAR, 11.80 ± 7.01 SLOWER, 13.93 ± 7.06; p = 0.08) We did not observe any significant differences in the frequency of relapses between the two groups (EULAR, 8/44, 18.2% vs SLOWER, 55/290, 19.0%; p = 0.63). Multivariable Cox proportional hazard analysis revealed no relationship GC dose at 12 weeks from treatment initiation and incidence of relapse. However, upon logistic regression analysis, the SLOWER group was found to have significant higher risk of a severe infectious event within 48 weeks from treatment initiation (p = 0.046; hazard ratio, 1.27; 95% confidence interval, 1.004 – 1.601).ConclusionOur finding indicates that clinicians tended to taper GC slower for patients with higher disease activity. However, slower GC taper was not found to reduce the frequency of relapse. In addition, slower GC taper was found to increase the risk of a severe infection. Hence, clinicians should pay attention not only relapsing but also late GC taper resulting in the risk of serious infection, especially in patients with higher disease activity of AAV.References[1]Eur J Clin Invest 2015;45 (3): 346–368.[2]Rheumatology (Oxford). 2021 Dec 24;61(1):205-212.[3]Arthritis Res Ther. 2021 Mar 20;23(1):90.[4]Scand J Rheumatol. 2022 Jan 20;1-13.[5]J Rheumatol. 2018 Apr;45(4):521-528.[6]Rheumatol Adv Pract. 2021 Mar 9;5(3):rkab018.[7]Ann Rheum Dis. 2016 Sep;75(9):1583-94.Figure 1.AcknowledgementsWe would like to thank Editage (www.editage.com) for English language editing.Disclosure of InterestsNone declared
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Suzuki T, Hishida T, C. M, Matsuda K, Nakagomi T, Omura S, Tanaka H, Masai K, Kaseda K, Asakura K, Asamura H. P26.07 Video-Assisted Thoracoscopic Surgery for Stage I Thymoma: Short-Term Outcomes and Appropriate Indications. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Terada T, Omura S, Kikuoka Y, Suzuki M, Inaka Y, Inui T, Matsuda M, Nabe T, Kawata R. Sustained effects of intralymphatic pollen-specific immunotherapy on Japanese cedar pollinosis. Rhinology 2020; 58:241-247. [PMID: 32091032 DOI: 10.4193/rhin19.301] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Intralymphatic immunotherapy (ILIT) for allergic patients requires only a few intralymphatic injections of the allergen. However, the effectiveness and safety for Japanese cedar pollinosis are unclear. The objectives of this study were to clarify whether and how long ILIT is effective for pollinosis, and its safety. METHODS In an open pilot investigation followed by a double-blind, placebo-controlled study, patients with Japanese cedar pollinosis received 3 intralymphatic inguinal injections of the pollen extracts before the first pollen season. The symptom medication score (SMS), nasal provocation testing and scoring visual analogue scale (VAS) were assessed after the first-third seasons. RESULTS (1) Although mild adverse events were induced at the injected site, severe adverse events were not noted. (2) During the latter part of the first season, ILIT-treated patients (n=12) tended to show improved SMS compared to placebo-treated (n=6) without statistical significance. When assessed by nasal provocation testing and VAS scoring after the first season, the effectiveness of ILIT was significant. (3) The effects of ILIT continued until the second or third season. (4) Neither allergen-specific antibodies nor Treg/Breg cells changed in the peripheral blood. CONCLUSIONS ILIT was safe and effective for Japanese cedar pollinosis. The clinical effects remained for 1-2 years.
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Affiliation(s)
- T Terada
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
| | - S Omura
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
| | - Y Kikuoka
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
| | - M Suzuki
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
| | - Y Inaka
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
| | - T Inui
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
| | - M Matsuda
- Laboratory of Immunopharmacology, Faculty of Pharmaceutical Sciences, Setsunan University, Osaka, Japan
| | - T Nabe
- Laboratory of Immunopharmacology, Faculty of Pharmaceutical Sciences, Setsunan University, Osaka, Japan
| | - R Kawata
- Department of Otolaryngology, Head and Neck Surgery, Osaka Medical College, Osaka, Japan
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Kita S, Fujita K, Imai H, Aoyagi M, Shimazaki K, Yonemitsu I, Omura S, Ono T. Postoperative stability of conventional bimaxillary surgery compared with maxillary impaction surgery with mandibular autorotation for patients with skeletal class II retrognathia. Br J Oral Maxillofac Surg 2020; 58:57-61. [DOI: 10.1016/j.bjoms.2019.10.309] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 10/16/2019] [Indexed: 11/29/2022]
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Aso A, Nakamura T, Fukuyama Y, Fukuda S, Sibao K, Araki M, Meno K, Yakebe D, Omura S, Mori T, Takenaka K, Murasato Y. P1912Incidence of silent cerebral thromboembolism in catheter ablation for atrial fibrillation under the use of DOAC: Comparison of cryoballoon versus radiofrequency ablation system. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Silent cerebral thromboembolism (CE) in catheter ablation for atrial fibrillation (AF) is not rare. Prior our study has reported lower incidence of silent CE in AF radiofrequency (RF) ablation using irrigated-tip catheter than conventional 4 or 8mm-tip catheter. In addition, the incidence of silent CE in AF ablation under direct oral anticoagulant (DOAC) was equivalent to continuous therapeutic warfarin. Recently pulmonary vein isolation (PVI) using cryoballoon (CB) has emerged as an alternative technique to RF ablation because some studies suggested that the efficacy for PVI by CB was equivalent to RF. However, incidence of silent CE in CB ablation under the use of DOAC is unknown.
Objective
We aimed to evaluate the incidence new silent CE in AF ablation using CB system compared with irrigated RF system under the use of DOAC.
Methods
322 consecutive patients with paroxysmal or persistent AF (155 using CB system, 167 using RF system) who underwent the first AF ablation were taking DOAC more than one month prior to the procedure. Throughout AF ablation procedure, heparin was administered to maintain activated clotting time (ACT) between 300 and 400 seconds. Head MRI was performed in all patients within 24 hours after the procedure.
Results
In 14 (9.0%) patients using CB and in 20 (12.0%) patients using RF, head MRI showed new embolic lesions without neurological symptom (P=0.469). Although the amount of heparin during the procedure in group CB was significantly less than in group RF (16134±3125 U vs. 18689±5222 U; P<0.0001), amount of heparin per hour in group CB was more than in group RF (8335±1955 U/h vs. 6143±1918 U/h; P<0.0001) because procedure time in group CB was shorter than in group RF (121.3±34.1 min vs. 189.5±47.4 min; P<0.0001). Mean ACT in both groups was maintained high level (3367±25.3 sec. vs. 338.6±23.5 sec.; P=0.479). In univariate analysis, minimum ACT during procedure, as before puncture of interatrial septum, were significantly correlated with the incidence of silent CE (P=0.027).
Conclusions
The incidence of silent CE in AF ablation using CB system was lower than RF system, although it was not a significant difference between different ablation techniques for AF. In AF ablation, the use of CB may be preferred rather than RF as ablation system in regard to risk reduction of thromboembolic complications.
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Affiliation(s)
- A Aso
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - T Nakamura
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - Y Fukuyama
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - S Fukuda
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - K Sibao
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - M Araki
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - K Meno
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - D Yakebe
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - S Omura
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - T Mori
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - K Takenaka
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - Y Murasato
- National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
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Omura S, Kaseda K, Masai K, Hishida T, Ohtsuka T, Asamura H. P3.17-10 Outcome of Surgical Resection for Superior Sulcus Tumor: Experience at a Single Institution. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Masai K, Omura S, Suzuki M, Tanaka H, Kuriyama S, Sakamaki H, Kaseda K, Hishida T, Ohtsuka T, Asamura H. PUB055 Nodal Status Based on the Anatomical Location or the Number of Lymph Nodes Metastasis. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sakamaki H, Otsuka T, Suzuki M, Omura S, Tanaka H, Suzuki Y, Kuriyama S, Hamada K, Yotsukura M, Kaseda K, Masai K, Hishida T, Asamura H. P1.17-017 Usefulness of FDG-PET for Differentiating Thymic Epithelial Tumors from Malignant Lymphomas. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Omura S, Sato F, Martinez N, Park A, Cvek U, Alexander J, Tsunoda I. Bioinformatics analyses determined the CNS and peripheral lymphoid surrogate biomarker candidates between two distinct EAE models for progressive multiple sclerosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yajima Y, Oshima M, Iwai T, Kitajima H, Omura S, Tohnai I. Computational fluid dynamics study of the pharyngeal airway space before and after mandibular setback surgery in patients with mandibular prognathism. Int J Oral Maxillofac Surg 2017; 46:839-844. [PMID: 28412180 DOI: 10.1016/j.ijom.2017.03.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 01/21/2017] [Accepted: 03/21/2017] [Indexed: 10/19/2022]
Abstract
The purpose of this study was to investigate the relationship between the pressure drop in the pharyngeal airway space (ΔPPAS) and the minimum cross-sectional area (minCSA) of the pharyngeal airway before and after mandibular setback surgery using computational fluid dynamics, in order to prevent iatrogenic obstructive sleep apnoea. Eleven patients with mandibular prognathism underwent bilateral sagittal split osteotomy for mandibular setback. Three-dimensional models of the upper airway were reconstructed from preoperative and postoperative computed tomography images, and simulations were performed using computational fluid dynamics. ΔPPAS and the minCSA of the pharyngeal airway were calculated, and the relationship between them was evaluated by non-linear regression analysis. In all cases, the minCSA was found at the level of the velopharynx. After surgery, ΔPPAS increased significantly and the minCSA decreased significantly. The non-linear regression equation expressing the relationship between these variables was ΔPPAS=3.73×minCSA-2.06. When the minCSA was <1cm2, ΔPPAS increased greatly. The results of this study suggest that surgeons should consider bimaxillary orthognathic surgery rather than mandibular setback surgery to prevent the development of iatrogenic obstructive sleep apnoea when correcting a skeletal class III malocclusion.
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Affiliation(s)
- Y Yajima
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - M Oshima
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - T Iwai
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan.
| | - H Kitajima
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - S Omura
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
| | - I Tohnai
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
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Iwai T, Yajima Y, Honda K, Murata S, Omura S, Tohnai I. Computational fluid dynamic simulation of pharyngeal airway before and after mandibular setback surgery. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Iwai T, Omura S, Honda K, Shibutani N, Fujita K, Yamashita Y, Takasu H, Murata S, Tohnai I. Mandible-first in bimaxillary orthognathic surgery: an accurate bimaxillary repositioning technique with straight locking miniplates. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Torikai K, Kijima T, Nagaoka R, Murashima M, Naganishi H, Yasumura K, Fujuta K, Omura S. Cutting-edge treatment of cleft lip and palate. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Alexander JS, Chervenak R, Weinstock-Guttman B, Tsunoda I, Ramanathan M, Martinez N, Omura S, Sato F, Chaitanya GV, Minagar A, McGee J, Jennings MH, Monceaux C, Becker F, Cvek U, Trutschl M, Zivadinov R. Blood circulating microparticle species in relapsing-remitting and secondary progressive multiple sclerosis. A case-control, cross sectional study with conventional MRI and advanced iron content imaging outcomes. J Neurol Sci 2015; 355:84-9. [PMID: 26073484 DOI: 10.1016/j.jns.2015.05.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 05/12/2015] [Accepted: 05/20/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Although multiple sclerosis (MS) is thought to represent an excessive and inappropriate immune response to several central nervous system (CNS) autoantigens, increasing evidence also suggests that MS may also be a neurovascular inflammatory disease, characterized by endothelial activation and shedding of cell membrane microdomains known as 'microparticles' into the circulation. OBJECTIVE To investigate the relationships between these endothelial biomarkers and MS. METHODS We examined the relative abundance of CD31(+)/PECAM-1, CD51(+)CD61(+) (αV-β3) and CD54(+) (ICAM-1) bearing microparticles in sera of healthy individuals, patients with relapsing-remitting MS, and secondary-progressive MS. We also investigated the correlation among circulating levels of different microparticle species in MS with conventional MRI (T2- and T1-lesion volumes and brain atrophy), as well as novel MR modalities [assessment of iron content on susceptibility-weighted imaging (SWI)-filtered phase]. RESULTS Differences in circulating microparticle levels were found among MS groups, and several microparticle species (CD31(+)/CD51(+)/CD61(+)/CD54(+)) were found to correlate with conventional MRI and SWI features of MS. CONCLUSION These results indicate that circulating microparticles' profiles in MS may support mechanistic roles for microvascular stress and injury which is an underlying contributor not only to MS initiation and progression, but also to pro-inflammatory responses.
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Affiliation(s)
- J S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - R Chervenak
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - B Weinstock-Guttman
- The Jacobs Neurological Institute, Department of Neurology, University of Buffalo, Buffalo, NY, USA
| | - I Tsunoda
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - M Ramanathan
- Department of Pharmaceutical Sciences, State University of New York, Buffalo, NY, USA
| | - N Martinez
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - S Omura
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - F Sato
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - G V Chaitanya
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - A Minagar
- Department of Neurology, Louisiana State University Health-Shreveport, LA, USA.
| | - J McGee
- Department of Neurology, Louisiana State University Health-Shreveport, LA, USA
| | - M H Jennings
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - C Monceaux
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - F Becker
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA; Department for General and Visceral Surgery, Muenster, Germany
| | - U Cvek
- Computer Sciences Department, Louisiana State University-Shreveport, LA, USA
| | - M Trutschl
- Computer Sciences Department, Louisiana State University-Shreveport, LA, USA
| | - R Zivadinov
- The Jacobs Neurological Institute, Department of Neurology, University of Buffalo, Buffalo, NY, USA; Buffalo Neuroimaging Analysis Center, Department of Neurology, University of Buffalo, Buffalo, NY, USA
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Yajima Y, Iwai T, Kitajima H, Ohara Y, Honda K, Shibutani N, Fujita K, Yamashita Y, Murata S, Omura S, Oshima M, Tohnai I. Evaluation of airway resistance and wall shear stress affected by mandibular setback surgery using computational fluid dynamics. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Mitsunaga S, Iwai T, Kitajima H, Yajima Y, Ohya T, Hirota M, Mitsudo K, Aoki N, Yamashita Y, Omura S, Tohnai I. Cervicofacial subcutaneous emphysema associated with dental laser treatment. Aust Dent J 2014; 58:424-7. [PMID: 24320897 DOI: 10.1111/adj.12119] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2013] [Indexed: 11/28/2022]
Abstract
Cervicofacial subcutaneous emphysema is a rare complication of dental procedures. Although most cases of emphysema occur incidentally with the use of a high-speed air turbine handpiece, there have been some reports over the past decade of cases caused by dental laser treatment. Emphysema as a complication caused by the air cooling spray of a dental laser is not well known, even though dental lasers utilize compressed air just as air turbines and syringes do. In this study, we comprehensively reviewed cases of emphysema attributed to dental laser treatment that appeared in the literature between January 2001 and September 2012, and we included three such cases referred to us. Among 13 cases identified in total, nine had cervicofacial subcutaneous and mediastinal emphysema. Compared with past reviews, the incidence of mediastinal emphysema caused by dental laser treatment was higher than emphysema caused by dental procedure without dental laser use. Eight patients underwent CO2 laser treatment and two underwent Er:YAG laser treatment. Nine patients had emphysema following laser irradiation for soft tissue incision. Dentists and oral surgeons should be cognizant of the potential risk for iatrogenic emphysema caused by the air cooling spray during dental laser treatment and ensure proper usage of lasers.
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Affiliation(s)
- S Mitsunaga
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Kanazawa-ku, Yokohama, Japan
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Iwanaga N, Nakamura S, Kajihara T, Imamura Y, Miyazaki T, Izumikawa K, Kakeya H, Yanagihara K, Tashiro T, Sunazuka T, Omura S, Kohno S. P9 The potency of a new erythromycin (EM) derivative, EM900, to reduce the density of the nasopharyngeal Streptococcus pneumoniae colonization. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70254-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Omura S, Iwai T, Kimizuka S, Tohnai I. Response to the comments on 'An accurate maxillary superior repositioning technique without intraoperative measurement in bimaxillary orthognathic surgery'. Int J Oral Maxillofac Surg 2013; 42:420-1. [PMID: 23313284 DOI: 10.1016/j.ijom.2012.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 12/12/2012] [Indexed: 11/16/2022]
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23
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Sato F, Martinez N, Omura S, Alexander S, Minagar A, Tsunoda I. Curdlan, a Th17 Cell Inducer, Plays Contrasting Roles in a Viral Model for Multiple Sclerosis (P05.113). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p05.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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24
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Madhyastha R, Madhyastha H, Nakajima Y, Omura S, Maruyama M. MicroRNA signature in diabetic wound healing: promotive role of miR-21 in fibroblast migration. Int Wound J 2011; 9:355-61. [PMID: 22067035 DOI: 10.1111/j.1742-481x.2011.00890.x] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A major complication of diabetes mellitus is the disruption of normal wound repair process, characterised by insufficient production of growth factors. A molecular genetic approach wherein resident cells synthesise and deliver the growth factors to the wound site would be a powerful therapeutic strategy to treat diabetic wounds. One such molecular approach could be the application of microRNAs (miRNAs). This study reports differential expression of miRNAs related to cell development and differentiation, during wound healing in diabetic mice. Comparison of skin tissue from normal and diabetic mice showed that 14 miRNAs were differentially expressed in diabetic skin; miR-146b and miR-21 were the most noteworthy. Expression pattern of these miRNAs was also altered during healing of diabetic wounds. A subset of miRNAs (miR-20b, miR-10a, miR-10b, miR-96, miR-128, miR-452 and miR-541) exhibited similar basal levels in normal and diabetic skins, but displayed dysregulation during healing of diabetic wounds. Amongst the miRNAs studied, miR-21 showed a distinct signature with increased expression in diabetic skin but decreased expression during diabetic wound healing. We analysed the role of miR-21 in fibroblast migration, because migration of fibroblasts into the wound area is an important landmark facilitating secretion of growth factors and migration of other cell types into the wound, thus enhancing the healing process. Using gain-of and loss-of function approaches, we show that miR-21 is involved in fibroblast migration. Our preliminary studies implicate an important role for miRNAs in the pathogenesis of diabetic wounds.
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Affiliation(s)
- R Madhyastha
- Department of Applied Physiology, School of Medicine, University of Miyazaki, Miyazaki, Japan.
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25
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Saito Y, Omura S. Domain competition during ballistic deposition: effect of surface diffusion and surface patterning. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 84:021601. [PMID: 21928993 DOI: 10.1103/physreve.84.021601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Indexed: 05/31/2023]
Abstract
We investigate domain competition occurring during aggregate growth under ballistic deposition on a one-dimensional substrate by kinetic Monte Carlo simulations. In order to capture adsorbate molecules being deposited vertically, domains grow tall by extending their branches laterally and suppress the growth of neighboring short domains. When molecules are deposited on a flat substrate and frozen at the deposition site, the population density of domains, ρ, decreases by a power law as ρ ∼ h(-2/3) at height h. In contrast, if the effect of surface diffusion is taken into account, the domain density decreases rapidly as ρ ∼ 1/h. On a substrate patterned with an array of nanopillars, domains growing from pillar tops tend to envelop those growing from gaps between pillars. To completely suppress the growth of domains in gaps, pillar periodicity λ should be smaller than a critical value λ(c). We estimate this value approximately using the slope angle and the aspect ratio of a single isolated domain.
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Affiliation(s)
- Yukio Saito
- Department of Physics, Keio University, Yokohama 223-8522, Japan.
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26
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Ichihara S, Kobayashi T, Omura S, Li W, Ding X, Hiraku Y, Hiraku Y, Ichihara G. Occupational health survey on workers handling titanium dioxide. Toxicol Lett 2011. [DOI: 10.1016/j.toxlet.2011.05.963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Madhyastha R, Madhyastha H, Nakajima Y, Omura S, Maruyama M. Curcumin facilitates fibrinolysis and cellular migration during wound healing by modulating urokinase plasminogen activator expression. Pathophysiol Haemost Thromb 2010; 37:59-66. [PMID: 21071923 DOI: 10.1159/000321375] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Accepted: 08/24/2010] [Indexed: 11/19/2022]
Abstract
Urokinase plasminogen activator (uPA) plays a vital role in the early phases of wound healing by aiding fibrin dissolution and promoting the migration, proliferation, and adhesion of various cells to the wound bed. The efficacy of botanicals in healing wounds is an area of active research. Among these, curcumin, a yellow pigment abundant in turmeric rhizome, has been the center of extensive studies. This study focused on the effect of curcumin on uPA expression and its consequence on fibrin dissolution and cellular migration. Treatment of human fibroblast cells with curcumin caused an upregulation of uPA mRNA and protein. Activation of JNK and p38 MAPK signal pathways was necessary for the upregulation of uPA. Curcumin treatment resulted in an increase in fibrinolytic activity and cell migration towards the wound area. The involvement of uPA in fibrinolysis and cell migration was confirmed by zymography and siRNA studies, respectively.
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Affiliation(s)
- R Madhyastha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
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28
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Mogi T, Kawakami T, Arai H, Igarashi Y, Matsushita K, Mori M, Shiomi K, Omura S, Harada S, Kita K. Siccanin Rediscovered as a Species-Selective Succinate Dehydrogenase Inhibitor. J Biochem 2009; 146:383-7. [DOI: 10.1093/jb/mvp085] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Omura S. Drug Discovery as a Public Health Intervention: The Ivermectin Story. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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30
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Kageyama A, Haga T, Kasai H, Shizuri Y, Omura S, Takahashi Y. Marihabitans asiaticum gen. nov., sp. nov., a meso-diaminopimelic acid-containing member of the family Intrasporangiaceae. Int J Syst Evol Microbiol 2008; 58:2429-32. [DOI: 10.1099/ijs.0.65210-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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31
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Tsunoda M, Suzuki K, Sagara T, Takahashi A, Inokoshi J, Omura S, Sekiguchi T, Takenaka A, Tanaka H. Crystal structure of actinohivin; a novel anti-human immunodeficiency virus protein. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ara I, Matsumoto A, Bakir MA, Kudo T, Omura S, Takahashi Y. Actinomadura bangladeshensis sp. nov. and Actinomadura chokoriensis sp. nov. Int J Syst Evol Microbiol 2008; 58:1653-9. [DOI: 10.1099/ijs.0.65533-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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34
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Terayama R, Omura S, Fujisawa N, Yamaai T, Ichikawa H, Sugimoto T. Activation of microglia and p38 mitogen-activated protein kinase in the dorsal column nucleus contributes to tactile allodynia following peripheral nerve injury. Neuroscience 2008; 153:1245-55. [DOI: 10.1016/j.neuroscience.2008.03.041] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 03/14/2008] [Accepted: 03/15/2008] [Indexed: 01/23/2023]
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35
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Matsumoto A, Yamada M, Omura S, Takahashi Y. Microterricola viridarii gen. nov., sp. nov., a new member of the family Microbacteriaceae. Int J Syst Evol Microbiol 2008; 58:1019-23. [DOI: 10.1099/ijs.0.65070-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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36
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Radha KS, Madhyastha HK, Nakajima Y, Omura S, Maruyama M. Emodin upregulates urokinase plasminogen activator, plasminogen activator inhibitor-1 and promotes wound healing in human fibroblasts. Vascul Pharmacol 2008; 48:184-90. [PMID: 18328790 DOI: 10.1016/j.vph.2008.02.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Accepted: 02/08/2008] [Indexed: 10/22/2022]
Abstract
Urokinase plasminogen activator (uPA) system is important for several biological processes that call for extracellular proteolysis, fibrinolysis, cell migration, proliferation and angiogenesis. The current study highlights the fibrinolytic and wound healing potential of emodin, an anthraquinone, with relevance to the uPA system. Emodin increased the fibrinolytic activity of fibroblast cells in a dose-dependent manner. Zymography linked the activity to increased uPA activity. Subsequent RT-PCR and western analyses demonstrated uPA gene upregulation. Interestingly, PAI-1, the inhibitor of uPA was also upregulated. EMSA showed the upregulation occurred independent of emodin's effect on nuclear factor kappa B (NFkappaB). The effect on uPA system is supposedly via generation of reactive oxygen species (ROS) since cotreatment with ascorbic acid, an anti-oxidant, attenuated the activity. In addition to profibrinolytic potential, emodin also demonstrated wound healing activity in in vitro wound models. Presence of emodin in the medium enhanced the rate of migration of fibroblasts into the wounded region. These in vitro experiments reveal that emodin is a potent profibrinolytic and wound healing agent.
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Affiliation(s)
- K S Radha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan
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Abstract
Wound repair requires both recruitment and well co-ordinated actions of many cell types including inflammatory cells, endothelial cells, epithelial cells and importantly fibroblast cells. Urokinase-type plasminogen activator (uPA) system plays a vital role in wound healing phenomenon. We have previously demonstrated that C-phycocyanin (C-pc), a biliprotein from blue-green algae, transcriptionally regulates uPA through cAMP-dependent protein kinase A (PKA) pathway. To date, a role for C-pc in wound-healing scenario is not elucidated. This study was designed to examine the wound-healing property of C-pc in relation to fibroblast proliferation and migration. C-pc increased fibroblast proliferation in a dose-dependent manner. It also enhanced G1 phase of cell cycle and increased the expressions of cyclin-dependent kinases 1 and 2, which facilitate cell cycle progression, in a uPA-independent manner. In vitro wound healing and migration assays revealed the pro-migratory properties of C-pc. Short-interference RNA studies demonstrated that uPA was necessary for C-pc-induced fibroblast migration. C-pc also significantly elevated the expressions of chemokines (MDC, RANTES, Eotaxin, GRO α, ENA78 and TARC) and Rho-GTPases (Cdc 42 and Rac 1) in a uPA-dependent manner. Pre-treatment of C-pc-stimulated cells with pharmacological inhibitor of PI-3K (LY294002) annulled the expression of GTPases implying that Rac 1 and Cdc 42 were induced through PI-3K pathway. C-pc-induced cellular migration towards wounded area was also negatively affected by PI-3K inhibition. In vivo wound-healing experiments in mice validated our finding that C-pc accelerates wound healing. Our data provides conclusive evidence of a novel therapeutic usage for C-pc as a wound-healing agent. C-pc is a food and drug administration (FDA)-approved health supplement. We believe this compound can also be beneficial in healing of internal wounds, such as ulcers.
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Affiliation(s)
- H K Madhyastha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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Goodman AI, Olszanecki R, Yang LM, Quan S, Li M, Omura S, Stec DE, Abraham NG. Heme oxygenase-1 protects against radiocontrast-induced acute kidney injury by regulating anti-apoptotic proteins. Kidney Int 2007; 72:945-53. [PMID: 17667987 DOI: 10.1038/sj.ki.5002447] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Radiocontrast agents are thought to induce acute kidney injury in part through increased production of reactive oxygen species and increased cellular apoptosis. In this study we determined whether heme oxygenase-1 could prevent or reduce radiocontrast-induced acute kidney injury and, if so, what were the mechanisms by which this can occur. Sodium iothalamate was administered to uninephrectomized, salt-depleted male Sabra rats to initiate acute kidney injury. Heme oxygenase-1 was induced with cobalt protoporphyrin or inhibited with stannous mesoporphyrin. Inhibition of heme oxygenase exacerbated kidney injury as measured by an increase in plasma creatinine and in superoxide production. Heme oxygenase-1 induction prevented the increase in plasma creatinine and in superoxide in both the cortex and medulla compared to untreated rats with acute kidney injury. This protective effect of heme oxygenase-1 was associated with increased anti-apoptotic proteins Bcl-2 and Bcl-xl and a decrease of pro-apoptotic caspase-3 and caspase-9 along with increased expression of inactive BAX. Our study suggests that increased levels of heme oxygenase-1 are protective against acute kidney injury due to radiocontrast exposure.
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Affiliation(s)
- A I Goodman
- Department of Pharmacology, New York Medical College, Valhalla, New York, USA
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Takeyama M, Kasuda S, Sakurai Y, Shima M, Takeda T, Omura S, Naka H, Yoshioka A. Factor VIII-Mediated Global Hemostasis in the Absence of von Willebrand Factor. Int J Hematol 2007; 85:397-402. [PMID: 17562614 DOI: 10.1532/ijh97.06214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Although the efficacy of recombinant factor VIII (rFVIII) in the treatment of type 3 von Willebrand disease (VWD) has been reported, the mechanisms by which FVIII concentrates devoid of von Willebrand factor (VWF) induce improvements in hemostasis are poorly understood. To address the role of FVIII or intrinsic coagulation in the absence of VWF, we performed a hemostatic analysis. Blood samples were obtained before and after the administration of rFVIII to 2 patients with type 3 VWD. A rotating thromboelastometry assay was performed to examine global interactions in hemostasis. Studies of thrombin-and shear-induced platelet aggregation were also conducted to elucidate the effect on platelet activation. Furthermore, we assessed the rise in the thrombin-induced intracellular concentration of free calcium [Ca2+]i. Addition of rFVIII to preinfusion blood in vitro corrected thromboelastometric parameters and thrombin-induced aggregation. In ex vivo studies, thromboelastometry analysis showed that rFVIII shortened the onset and progression of the coagulation process. Furthermore, rFVIII corrected low shear-induced and thrombin-induced platelet aggregation in platelet-rich plasma. In addition, rFVIII improved thrombin-induced [Ca2+]i flux in washed platelets. Our observations suggested that FVIII is incorporated into platelets to activate them, as well as to act directly in intrinsic coagulation in the absence of VWF. FVIII may play a critical role even in the absence of VWF.
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Affiliation(s)
- Masahiro Takeyama
- Department of Pediatrics, Nara Medical University School of Medicine, Kashihara, Japan
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Sudo H, Ozaki K, Muramatsu H, Kamei K, Yogo K, Cynshi O, Koga H, Itoh Z, Omura S, Takanashi H. Mitemcinal (GM-611), an orally active motilin agonist, facilitates defecation in rabbits and dogs without causing loose stools. Neurogastroenterol Motil 2007; 19:318-26. [PMID: 17391248 DOI: 10.1111/j.1365-2982.2006.00885.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The effects of mitemcinal (GM-611), an orally active motilin agonist, on defecation were investigated in rabbits and dogs. In normal rabbits, within 0-3 h of dosing, orally administered mitemcinal (2.5-10 mg kg(-1)) increased stool weight in a dose-dependent manner without causing loose stools. Sennoside (12-48 mg kg(-1)) also facilitated defecation within 2-9 h of oral administration, but the stools were significantly loosened. In the morphine-induced constipation model, the stool weight of morphine-treated rabbits (1 mg kg(-1)) was only 37.5% of that of untreated animals. Mitemcinal (0.5-20 mg kg(-1)) dose-dependently increased stool weight without increasing stool water content. At the highest dose of mitemcinal, stool weight recovered to 83.9% of that of untreated animals. In normal dogs, mitemcinal (0.3-3 mg kg(-1)) reduced the time to first bowel movement after oral administration without inducing diarrhoea at any dose. These results indicate that mitemcinal facilitates defecation without inducing severe diarrhoea. It is suggested that mitemcinal may be a novel therapeutic agent for constipation that enables easier control of the timing of defecation because of the early onset and short duration of its action, compared with sennoside.
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Affiliation(s)
- H Sudo
- Fuji-Gotemba Research Laboratories, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka, Japan
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Ozaki K, Sudo H, Muramatsu H, Yogo K, Kamei K, Koga H, Itoh Z, Omura S, Takanashi H. Mitemcinal (GM-611), an orally active motilin receptor agonist, accelerates colonic motility and bowel movement in conscious dogs. Inflammopharmacology 2007; 15:36-42. [PMID: 17323194 DOI: 10.1007/s10787-006-1542-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The prokinetic effects of mitemcinal, an orally active motilin receptor agonist, on the lower gastrointestinal tracts were investigated in conscious dogs. Oral administration of mitemcinal (0.1-1 mg/kg) stimulated colonic motility, which was measured by chronically implanted force-transducers, as well as gastric motility in a dose-dependent manner. The gastrointestinal contractile activities induced by mitemcinal were inhibited by the continuous intravenous infusion of GM-109, a selective motilin receptor antagonist. Oral administration of mitemcinal (0.3-3 mg/kg) also accelerated bowel movement after feeding without inducing diarrhea in dogs. The results demonstrate that mitemcinal stimulates colonic motility via motilin receptors and the effect of mitemcinal on colonic motility may reflect bowel movement after feeding. Thus, mitemcinal could be a promising agent for treatment of not only the upper but also the lower gastrointestinal motility disorders.
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Affiliation(s)
- K Ozaki
- Fuji-Gotemba Research Laboratories, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka, 412-8513, Japan
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Sakurai Y, Shima M, Imai Y, Omura S, Kirita T, Yoshioka A. Successful use of recombinant factor VIII devoid of von Willebrand factor during multiple teeth extractions in a patient with type 3 von Willebrand disease. Blood Coagul Fibrinolysis 2006; 17:151-4. [PMID: 16479198 DOI: 10.1097/01.mbc.0000214711.19116.09] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We report a 55-year-old patient with type 3 von Willebrand disease who underwent multiple tooth extractions with successful hemostatic management using recombinant factor VIII. The patient was previously misdiagnosed and treated incorrectly then at 53 years old, he was diagnosed with type 3 von Willebrand disease. As he had avoided dental treatments for two decades due to severe bleeding after dental extraction, multiple severe caries and marginal periodontitis were revealed. The patient refused the use of blood products in hemostatic management because he was afraid of blood-borne diseases and development of anti-von Willebrand factor alloantibodies. After close consultation, we therefore decided to use recombinant factor VIII. Four teeth extraction procedures were executed twice. Before extraction, bolus recombinant factor VIII (50 IU/kg) was administered intravenously followed by continuous infusion (5-10 IU/kg per h) for approximately 48 h. The factor VIII:C level increased from about 1 to 20-32% 30 min after bolus infusion. During continuous infusion (10 IU/kg/h), factor VIII:C was maintained at more than 10%. Little bleeding occurred during and after the multiple teeth extractions and during suture removal. On frequent examinations during a 1-year follow-up, neither von Willebrand factor nor factor VIII inhibitors were detected.
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Affiliation(s)
- Yoshihiko Sakurai
- Department of Pediatrics, Nara Medical University School of Medicine, Kashihara, Nara, Japan.
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Madhyastha HK, Radha KS, Sugiki M, Omura S, Maruyama M. Purification of c-phycocyanin from Spirulina fusiformis and its effect on the induction of urokinase-type plasminogen activator from calf pulmonary endothelial cells. Phytomedicine 2006; 13:564-9. [PMID: 16920511 DOI: 10.1016/j.phymed.2005.09.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Accepted: 07/01/2005] [Indexed: 05/11/2023]
Abstract
c-Phycocyanin (c-pc), a blue coloured, fluorescent protein was purified from blue-green alga, Spirulina fusiformis and its effect on fibrinolytic system in vascular endothelial cells was investigated. The c-pc consisted of two subunits, alpha and beta, whose molecular masses were 16 and 17 kDa, respectively. N-terminal sequences of both subunits were well conserved compared with other blue green algal phycobiliproteins. Fibrinolytic activity in the medium conditioned by calf pulmonary arterial endothelial cells was measured by the fibrin plate method. The c-pc increased the fibrinolytic activity in dose- and time-dependent manners. Fibrin zymographic studies indicated that c-pc-induced urokinase-type plasminogen activator in the cells. These in vitro results suggest that c-pc from S. fusiformis is a potent profibrinolytic protein in the vascular endothelial system.
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Affiliation(s)
- H K Madhyastha
- Department of Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan
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Madhyastha HK, Radha KS, Sugiki M, Omura S, Maruyama M. C-phycocyanin transcriptionally regulates uPA mRNA through cAMP mediated PKA pathway in human fibroblast WI-38 cells. Biochim Biophys Acta Gen Subj 2006; 1760:1624-30. [PMID: 17029796 DOI: 10.1016/j.bbagen.2006.08.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2006] [Revised: 07/25/2006] [Accepted: 08/18/2006] [Indexed: 11/21/2022]
Abstract
We have previously demonstrated the efficacy of c-phycocyanin in up-regulation of urokinase-type plasminogen activator (uPA) in bovine endothelial cell line. However, the mechanism of action and pathway elucidation in uPA regulation is unclear. In experiments reported here, we have investigated the mechanism of action of c-phycocyanin (c-pc) induced uPA gene modulation in human fibroblast (WI-38) cell line. ELISA test confirmed that c-pc increased the uPA antigen whereas PAI-1 antigen level was unaffected. Treatment of cells with c-pc significantly (P<0.05) enhanced the uPA mRNA level in a dose (50 microg/ml) and time dependent (up to 4 h) manner. This effect of c-pc was abolished by treatment with dichloro-1-beta-D-ribofuranosyl benzamidazole (DRB) (10 microg/ml). Co-treatment of c-pc with 200 microg/ml cycloheximide (CHX), translation inhibitor, resulted in over accumulation of uPA mRNA. These results suggest that uPA induction by c-pc is transcriptionally regulated and does not require de novo protein synthesis. We also provide evidence that c-pc stimulates uPA gene through cAMP dependent pathway as adenylyl cyclase (AC) inhibitor, dideoxyadenosine (DDA) significantly inhibited the uPA mRNA expression and co-treatment with adenylyl cyclase analogue, dBcAMP recovered the effect of c-pc on gene activity. Furthermore, the present investigation provides evidence on the regulatory pathway involved in the c-pc stimulus. C-pc induced uPA expression was completely inhibited by PKA inhibitor (KT 5200), indicating the regulation is dependent on PKA pathway. Elimination of PKC pathway components by prolonged incubation with excess amount of phorbol 12-myristate 13-acetate (PMA) failed to abolish the c-pc effect on uPA expression indicating the regulation is independent of PKC pathway. Taken together, our data indicate that uPA gene regulation by c-pc is transcriptionally controlled through cAMP mediated PKA pathway.
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Affiliation(s)
- H K Madhyastha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, MIYAZAKI-889-1692, Japan
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Ichino C, Soonthornchareonnon N, Chuakul W, Kiyohara H, Ishiyama A, Sekiguchi H, Namatame M, Otoguro K, Omura S, Yamada H. Screening of Thai medicinal plant extracts and their active constituents forIn Vitro antimalarial activity. Phytother Res 2006; 20:307-9. [PMID: 16557615 DOI: 10.1002/ptr.1850] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
To discover antimalarial substances from plants cultivated in Thailand 80%-EtOH extracts from selected plants were screened for in vitro antimalarial activity against the drug resistant K1 strain of Plasmodium falciparum. In total, 86 Thai medicinal plant samples representing 48 species from 35 genera in 16 families were screened and two species (Polyalthia viridis and Goniothalamus marcanii) were found to show notable antimalarial activity (IC50: 10.0 and 6.3 microg/mL). Marcanine A and 16-hydroxycleroda-3,13(14)Z-dien-15,16-olide were identified as the respective major active constituents in P. viridis and G. marcanii, respectively.
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Affiliation(s)
- C Ichino
- The Kitasato Institute for Life Sciences, Kitasato University, Tokyo, Japan
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Omura S, Katagiri M, Awaya J, Furukawa T, Umezawa I, Oi N, Mizoguchi M, Aoki B, Shindo M. Relationship between the structures of fatty acid amide derivatives and their antimicrobial activities. Antimicrob Agents Chemother 2005; 6:207-15. [PMID: 15828193 PMCID: PMC444628 DOI: 10.1128/aac.6.2.207] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The structure-activity relationships of derivatives of the antibiotic cerulenin were investigated by chemically modifying dodecanoic acid, its skeletal back-bone. The dimethylamide derivatives were active against both gram-positive and -negative bacteria, and fungi. Among the compounds having modified groups at positions C2 and C4, the most active were those with a carbonyl group at C4 and a double bond at C2. The dimethylamide and pyrrolidine amide derivatives of this structure type were the most active. Activity against bacteria and yeast increased with the number of carbon atoms in the skeleton, with the maximum activity being observed at C=12. No significant differences in activity against fungi were observed with change in chain length.
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Radha KS, Sugiki M, Harish Kumar M, Omura S, Maruyama M. Post-transcriptional regulation of plasminogen activator inhibitor-1 by intracellular iron in cultured human lung fibroblasts--interaction of an 81-kDa nuclear protein with the 3'-UTR. J Thromb Haemost 2005; 3:1001-8. [PMID: 15869597 DOI: 10.1111/j.1538-7836.2005.01272.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The proteinase inhibitor, type-1 plasminogen activator inhibitor (PAI-1), is a major regulator of the plasminogen activator system involved in plasmin formation and fibrinolysis. The present study explores the effects of intracellular iron on the expression of PAI-1 and associated cell-surface plasmin activity in human lung fibroblasts; and reports the presence of a novel iron-responsive protein. ELISA revealed a dose-dependent increase in PAI-1 antigen levels expressed in the conditioned medium of cells treated with deferoxamine, in the three cell lines studied. A concomitant increase in mRNA levels was also observed by Northern analyses. Presaturation with ferric citrate quenched the effect of deferoxamine. Experiments with transcription and translation inhibitors on TIG 3-20 cells demonstrated that intracellular iron modulated PAI-1 expression at the post-transcriptional level with the requirement of de-novo protein synthesis. Electrophoretic mobility shift assay and UV crosslinking assays revealed the presence of an approximately 81-kDa nuclear protein that interacted with the 3'-UTR of PAI-1 mRNA in an iron-sensitive manner. Finally, we demonstrated that the increased PAI-1 is functional in suppressing cell-surface plasmin activity, a process that can affect wound healing and tissue remodeling.
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Affiliation(s)
- K S Radha
- Department of Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
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Li X, Bukawa H, Hirota M, Tsuyuki Y, Omura S, Fujita K. Novel OK-432-conjugated tumor vaccines induce tumor-specific immunity against murine tongue cancer. J Dent Res 2003; 82:636-40. [PMID: 12885850 DOI: 10.1177/154405910308200813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Priming with tumor antigens is one of the most important strategies in cancer immunotherapy. To enhance tumor antigenicity, OK-432, a streptococcal preparation, was coupled to squamous cell carcinoma (KLN-205) by means of a 0.2% glutaraldehyde method. The purpose of this study was to investigate whether OK-432-conjugated tumor vaccines could induce tumor-specific immunity. Our originally developed mouse tongue cancer model was used throughout this work for the analysis of antitumor effects. Prepared OK-432-conjugated KLN-205 vaccines were immunized 3 times to DBA/2 mice. The results showed that the KLN-205 vaccines induced cytolytic activity and strongly suppressed both KLN-205 tumor incidence and growth, and survival of the mice was improved. Moreover, the histological results showed that a greater number of lymphocytes had infiltrated around tumor cells by 24 hours after tumor inoculation in the vaccine group. These results suggest that immunizations with KLN-205 vaccines increase the antitumor effects against tongue cancer.
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Affiliation(s)
- X Li
- Department of Oral and Maxillofacial Surgery, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
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